TERRAFORMING TERRA
We discuss and comment on the role agriculture will play in the containment of the CO2 problem and address protocols for terraforming the planet Earth.
A model farm template is imagined as the central methodology. A broad range of timely science news and other topics of interest are commented on.

Wednesday, February 14, 2018

Researchers Find Human Impact on Forest Still Evident After 500 Years

Terra preta soils allowed a population density comparable to rice culture or about one family per acre of land. For that reason it plausible that the original population was in the tens of millions. Proximity to rivers also suggest that they used irrigation during the dry season as well. Those soils allowed continuous cropping.It is noteworthy that those soils now continue to support a different blend of vegetation than the surround. This is creditable because they will not need to dash fifteen feet down to locate enough nutrients. Thus a wider blend is possible.As remarked the population was huge and indirectly countable. The technology itself found its way throughout the Americas as well as mostly a later development and was linked to the corn culture in particular.. .

Tropical forests span a huge area, harbor a wide diversity of species, and are important to water and nutrient cycling on a planet scale. But in ancient Amazonia, over 500 years ago, clearing tropical forests was a way of survival to provide land for families to farm and villages to prosper. Researchers at the University of New Hampshire used high-tech tools to more precisely view where these cleared sites were and how much lasting impact they had on the rainforest in the Amazon Basin in South America.

"One of the key mysteries in this area of the world is that no one knows how many people lived in Amazonia before European contact," said Michael Palace, an associate professor in the Earth Sciences Department and Earth Systems Research Center at UNH. "Once the Europeans arrived, indigenous populations were devastated due to disease, slavery and displacement so it's often hard to determine lasting impact. It is important to understand the resilience or fragility of these forests to past human disturbance, which allows for appropriate planning on the use of natural resources."

One of the few indicators of human settlements are the terra preta, or Amazonian Dark Earths (ADEs). These are black, human-made soils that are enriched by materials left behind from past societies, pottery remnants, charcoal and other artifacts frequently associated with human origin. There is very little rock and metal in that part of the world (a former ocean bottom), and wood, bone and other organic materials decay quickly in the humid tropics.

In their study, recently published in the journal Ecosphere, the researchers used imagery from NASA's terra satellite, MODIS, and geospatial modeling to predict the ADE probability across six million square kilometers of the Amazonia. They found that biomass (primarily weight of trees in forests), tree height, and tree cover were all lower at ADE sites than adjacent random non-ADE locations. The ADE sites were also more susceptible to drought.

Indigenous people most likely used slash-and-burn techniques to clear the forests so the ADE sites may have been pre-selected due to the propensity for drought or intensity of dry seasons. Researchers also observed differences in spectral properties (reflective light) between ADE and non-ADE sites that are likely driven by forest structure and tree species, indicating that remnant forests are still showing impacts from past human settlement patterns.

Researchers further explain that the high spatial heterogeneity in ADE sites across the Amazon suggests that pre-Columbian occupation by indigenous people was complex and varied substantially across this ecologically diverse region. But they speculate that because of their proximity to the rivers, ADEs may have become areas of interest for other groups to settle and reoccupy, further impacting the forests and vegetation in the ADE areas.

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18 years old, having cleaned out my HS library, I concluded the only ambition worth having was becoming a great genius. An inner voice cheered. Yet it is my path I have shared much to the Human Gesalt. Mar 2017 - 4.56 Mil Pg Views, March 2013 - Posted my paper introducing CLOUD COSMOLOGY & NEUTRAL NEUTRINO described as the SPACE TIME PENDULUM. Sep 2010 -My essay titled A NEW METRIC WITH APPLICATIONS TO PHYSICS AND SOLVING CERTAIN HIGHER ORDERED DIFFERENTIAL EQUATIONS has been published in Physics Essays(AIP) June 2010 quarterly. 40 years ago I took an honors degree in applied mathematics from the University of Waterloo. My interest was Relativity and my last year there saw me complete a 900 level course under Hanno Rund on his work in Relativity. I continued researching new ideas and knowledge since that time and I have prepared a book for publication titled Paradigms Shift. I maintain my blog as a day book and research tool to retain data, record impressions, interpretations and to introduce new insights to readers.